package at.fhv.gis.service.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HeaderFilter implements Filter {

	@Override
	public void destroy() {

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletResponse res = (HttpServletResponse) response;
		HttpServletRequest req = (HttpServletRequest) request;

		res.addHeader("Access-Control-Allow-Origin", "*");
		if (req.getHeader("Access-Control-Request-Method") != null
				&& "OPTIONS".equals(req.getMethod())) {
			// CORS "pre-flight" request
			res.addHeader("Access-Control-Allow-Methods",
					"GET, POST, PUT, DELETE");
			res.addHeader("Access-Control-Allow-Headers",
					"X-Requested-With,Origin,Content-Type, Accept");
		}
		chain.doFilter(request, response);
	}

	@Override
	public void init(FilterConfig chain) throws ServletException {

	}

}
